When I last left off, I had made the mistake of hand painting inside the base…version of an alpha channel, and that's a terribly destructive modification.…So, it means that I can't really go back. If I made some sort of mistake when…painting inside of this channel, I can't go back to the base without having to…re-create it, and let's say that's not the route I want to take.…I want to go ahead and regain that original base from my history states.…That maybe possible, depending on how many times you brushed inside Photoshop.…

You may be able to go back to the History panel, and regain your work, and here is how.…I've saved my progress as Hair-only mask .psd, but what I want to stress here is…that file, by itself, will not give you what you need, because I cannot save…history along with a file.…In order to follow along with me, you will have had to perform the…previous exercise as well.…Anyway, here's what you do.…In case you ever run into this problem, and you're just trying to keep all of…your ducks in a row, then you go up to the Window menu, and you choose the History…

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11/4/2011

Photoshop Masking and Compositing: Fundamentals is the introductory installment of Deke McClelland's four-part series on making photorealistic compositions in Photoshop. The course shows how to make selections, refine the selections with masks, and then combine them in new ways, using layer effects, blend modes, and other techniques to create a single seamless piece of artwork. Deke introduces the Channels panel and the alpha channel, the key to masking and transparency in Photoshop; reviews the selection tools, including the Color Range tool , Quick Mask mode, and the Refine Edge command; and shows how to blend masked images so they interact naturally.